climton_075_mac.jpg Clinton makes points in favor of Prop. 87 during his address at the rally. Former President Bill Clinton leads a rally in downtown San Francisco to support Prop. 87, an initiative that seeks to tax oil production to fund development of alternative fuels. Event in, San Francisco, Ca, on 11/1/06. Photo by: Michael Macor/ San Francisco Chronicle Mandatory credit for Photographer and San Francisco Chronicle / Magazines Out Photo: Michael Macor